Unit carrier



Aug. l1

, 1953 J. G. LINDEMAN UNIT CARRIER 4 Sheets-Sheet l Filed Sept. 5, 194'?INVENTOR.

JESSE G. LINDEMAN Aug. 11, 1953 .1.G. LINDEM'AN UNIT CARRIER 4Sheets-Sheet 2 Filed Sept. 5, 1947 4N .GE

JESSE G. LINDEMAN Aug. ll, 1953 JESSE G. LINDEMAN Aug. 11, 1953 .1. G. LlNDEMAN 2,648,268

UNIT CARRIER Filed sept. 5, 1947 4 sheets-sheet 4 mi# FIG. 7 I

E |08 '09 i cwsl I f \\|3o lo' +V IOT 27 9 IN V EN TOR.

JESSE G. LINDEMAN Patented Aug. 11, 1953 UNIT CARRIER Jesse G. Lindeman,Yakima, Wash., assignon to: Deerel & Company, Moline,l Ill.,acorporation of Illinois Application'September 5, 1947, Serial-No.772,274.

1I),` Claims. 1

The present invention relates generally to agricultural implements andsimilar implements and more; particularly to earth Working machinery.

The object and general. nature ofthe present invention is the provisionof a new and improved tool carrier adapted to receive and/or supportearth workingv means, such as cultivating tools, material moving orhandling means, and thel like, andA particularly it is a feature of thisinvention to provide a new and improved tool carrier wherein theAposition of the tool-receiving bar may readily and easily be adjustedrelative to the side armsconnecting the end portions of said bar withthe. tractor, and still further, another feature of this` invention is.the provision of new and improved connections forconnecting a toolsupporting memberwith the tool' carrierto accommodate theA desiredyrelative lateral movement therebetween;

More specifically, itis a feature of this invention to provide new andimproved' attachment means for a tool carrier that may be reversedvrelative to thetractor so as to make itpossible to eiiect such reversalvwith a. minimum amount of manual eiort.

These and other objects and advantages ofthe present inventionV will beapparent to those skilled in the art after a consideration of thefollowing. detailed description, taken in conjunction with theaccompanying drawings.

In the drawings:

Figure 1 is a plan view of the preferredformof the. present invention,shown as connected to: a propelling agency inthe formof a tractor'of thecrawler tread type.

Figure 2 is aside view of the outfit shownv in Figure 1;. Figure 2Ashows the tool bar mounting.

Figure 3 isa fragmentary enlarged view of the adjusting means for thetool bar.

Figure iis a sectional view taken generally along the line 4-4 of Figure3.

Figure 5 is an enlarged side View anclFigurer 6 is a plan view of thetool frameconnection with the tractor crawler tracky frames.

Figure '7 is a sectional view taken generally along the. line 1 1. ofFigure 6.

Figure 811s a detail view of one` of theA tool frame ca'p locking pins.

Figure 9 is a sectional view taken generally along the line 9-9 ofFigure 7, showing theside arm socket cap in a trunnion releasingposition.

For the purpose ofy illustration I haveshown my invention in use with atractorv I0 of the track or crawler tread typehaving treads or tracks- II op*- eratively connected in. any suitable way with the main body 9 ofthe tractor I0; The. latter ls;off a. commercialtype extensively usedand has'at each sid'ethe abovementioned treads or'tracks I I suitablymounted on track frames I3 connected, as aforesaid,y to themainiframe'of the tractor.. The tractor' Il! includesy a, suitable powerplant and also a hydraulic unit I4 of. conventional con struction drivenfrom said power4 plant and includ'ing' suitable* control.. means (notshown) wherebyfuid underfpressure may be delivered to or withdrawn fromone or morehydraulic piston4 and cylinder units I5 to which moredetailed ref.- erence4 will' be made below. Each track frame I3includes.` front and rear sprocket wheels Il! over which the crawler;tracks or treads Il pass.

The-i tool carrier, which constitutes` the principalportion ofthepresent invention, is indicated in-I its entirety by the referencenumerall 25v and comprises right and left hand side arms 26. and 21 anda cross bar 2.8, normally rigidlyconnected to the outer ends of the'sidearms 26 and 21. The latter members preferably arev identical., exceptthat:parts thereof may berighthand or left'hand` as the case may be, andhence a description of one of'them will suflice.V Each side armcomprises a tubular member 3 I made up offapairof. channellikeelongatedl members 32- and 33 arranged in opposing.y relation andhavingtheir flanges suit.- ably secured together, as by welding, at 34..

As indicated at 3B, Figure 3, portions of the webs oi the channelmembers32 and 3.3 may be bent towardone another toreceive a pivot bolt 1,4 thatwill be.` referred to later in detail', and at their-'forward ends thevchannel members 32 and 33 are. secured, as by Welding, to the terminalmemberl 3-'I` that is made up: of an inner section 38 and an' outersection 39, both preferably formed of cast steelf parts. The lattermembers, when` secured together-andv to the adjacent ends ofi the'Aside: armchannel. members 32k and 33, form a; hollow side arm portionwhich is adapted to receive. crossi bar:- adjusti'ng linkagev 4U whichwill. be. described later.

Each; of the inner side arm terminal members 3.8? includes a. laterallyinwardly directed cylindrical bearing sleeve and a reenforcing'web 45which connects the sleeve portion 45 to a rearwardly extending portion4lr that is weldedv kor. otherwise. xed'to the outerr end of the innerchannell member 32. The cross bar member 28 preferably comprises' acentral transverse'party 5l preferablyY made up of two channel-likesections 52" and 53 suitably welded together along. their contiguous;flanges, and a. pair of offsetlink-re*- ceivingfmembers 55.2and156,preferably of identical construction. Each of the latter membersincludes a spindle portion 51 seating in the bearing section 45, anouter offset section 58 shaped to receive the central bar member 5|,which is preferably welded thereto, and a link-receiving portion 59having a vertically disposed bearing section 6|. The outer end of eachof the spindle sections 51 extends into the hollow section 62 of theassociated side arm and has an arm 64 extending generally longitudinallywithin the outer end of the associated side arm and rmly fixed, as bywelding, to the spindle section 51. The laterally outer end of eachspindle section 51 is hollowed to provide a bearing portion 66 whichseats over a lug 61 formed on the inside of the laterally outer side armterminal member 3S, The inner face at the forward end of the arm 64bears against a shoulder 68 on the side arm member 38 for holding thelatter, and the side arm itself, against axial displacement away from tlcross bar member 59.

The angular relationship between the cross bar 28 and the side arms 26and 21 may be adjusted when desired by operating the linkages 40mentioned above, there being one such linkage in the outer end of eachside arm, and since these linkages are identical a description of onewill sufce. The linkage 40 comprises not only the arm 64 mentionedabove, but a second Varm 1| which has an inner bifurcated portion 12slidably disposed on a square block 13 that in turn is rockably mountedon a pivot bolt 14 that is extended through apertures in the side armchannels 32 and 33. The intermediate portion of the arm or lever 1|carries a pivot member 11 that receives the apertured lugs 18 at theouter end of the arm 64. The outer end of the arm or lever 1| isprovided with a threaded swivel 19 into which the threaded portion 8| ofa crank screw 82 is disposed. The outer end of the crank screw 82 issupported by anti-friction bearing means 63 in a cap 84 that is mountedon a boss 85 formed on the outer side arm terminal member 30, being heldin place by cap screws 86 or the like. The outer end of the crank screwmember 82 carries an operating handle 81, and it will be seen that byturning the crank screw 82, the arm 1| will be rocked about its pivotalsupport 14 and, with a multiplied leverage, will act against the arm 64to turn the cross bar relative to the side arm, thus, in effect,swinging the side arm about a transverse axis coinciding generally withthe pivotal connection of the cross bar member 28 therewith. In thisway, the position of the cross bar 28 may be changed, that is, thelatter member may be leveled, relative to the side arms when the latterare attached to the tractor.

A draw trunnion IIII is disposed at each side of the tractor andpreferably is rigidly secured, as by bolts |02, to the associated trackframe I3, preferably adjacent the central portion thereof. Each trunnionmember comprises an attache ing bracket section ||4 (Figure 5), in whichthe holes receiving the bolts |02 are disposed, and a double trunnionsection having inner and outer bearing portions |06 and |01, the latterbeing of slightly smaller diameter than the inner section |06, and bothbeing generally cylindrical. The bearing section |01 is provided with atransverse groove or slot |08 therein which cooperates with means on theassociated side arm of the tool frame for holding the side arm inposition, as will be referred to later in detail. The laterally innerbearing section |06 of the trunnion IOI is disposed between abutmentpads I and I I2 that are formed integral with the trunnion member IOI,and a `power cylinder mounting member I I5 is carried on the laterallyinner bearing section |06. The mounting member ||5 includes a sleevesection I I6 and laterally outwardly extending sections ||1 and II8having a plurality 0f bolt holes ||9 to receive the associated cylinderunit, described below, and a downwardly facing pair of abutments |22adapted, when the sleeve section I6 is mounted on the bearing section|06 of the trunnion IOI, to rest against the pads III and II2 on themember IOI. Since the trunnion members IOI are rmly and rigidly securedto the track frames by the bolts |02, the cylinder unit mounted on themounting member ||5 is likewise supported by the bearing section |06 butis held against rocking movement thereon by the pads III and ||2 andassociated parts.

The inner end of each side arm 26 and 21 of the tool frame carries asocket member |30 having a laterally inwardly and upwardly facing socketsection |3| and a shank portion |32 that is welded to the inner end ofthe associated side arm channels. The diameter of the socket |3| is suchas to receive the laterally outwardly disposed trunnion bearing section|01, and each socket |3| is open upwardly so as to facilitate theattachment of the arms to the trunnions. Each of the socket members |30is provided with a cap that is pivoted, as at |36, to a lug extension|31 on the socket member |30. To this end, the cap |35 is provided witha pair of apertured lugs |38 which receive the pin |36. The underportion of the cap, as indicated at I4 I, is rounded and cooperates withthe trunnion bearing section |01, and a lug |09 on each cap enters theassociated groove or slot |08 in the bearing portion |01, whereby thecap member holds the side arm in place on the trunnion section |05. Thecap member |35 is provided with a longitudinal opening |43 in which alocking pin |44 is adapted to be disposed, the outer end of the lockingpin |44 being adapted to be received by an opening |45 formed in theupper portion of the socket member I 30. Each locking pin |44 is ofparticular construction. As shown, the locking pin |44 comprises ahandle section |5I and a shank section |52. At its outer end the lattersection is cylindrical, as at 53, the major portion of the remainder ofthe shank being slabbed off, as indicated at |54. Adjacent the handlesection |5I, the shank section |52 is provided with an annular groove|56. The opening in the socket member lug section I 31 is disposed so asto intersect the opening |58 in the lug |31 to receive the locking pin|36. These openings are so disposed that when the pivot pin 36 for thecap is removed the locking pin |44 may be inserted, passing the samethrough the opening I 58 so that the cylindrical portion |53 of thelocking pin |44 enters the opening |45 at the other side of the socket.Then by turning the locking pin |44 into such position that the atportion |54 is disposed upwardly, the pivot pin |36 for the cap may beinserted. Any suitable means may be provided for holding the pin |36 inplace, and as long as the latter is in place the locking pin |44 cannotbe removed, although it may be withdrawn from the opening |45 in thesocket |30. Thus, the locking pin I 44 normally remains a permanent partof the cap member and may readily be used for locking the cap member intrunnion-receiving relation by inserting the cylindrical section |53into the opening |45 and then turning the handle section I5| so that thegroove |56, at some point 5.. removed; from the atzportionIBLembracestthe: pivot. pin` I 361 ThisI prevents the locking: pin- Ift.from. being withdrawn. from the; socket opening: |45.. However, allthat. it isnecessary to do toireleasethe capan'di swing: the sameupwardly about: the pivot |36 is. to swing the handle section I 5| so asto carry the nat portion upwardly, whereupon; the pin'v |40 may` be slidoutwardly relative; tor the; cap member andv so .withdrawnfronrtheopening |451in the sockettrnember.Y The latter member: iswelded: tothe inner. endsof. the side arms, andf to: this end the. shanksection |32: is. laterally* oisetand is provided with flanges Hilf.. Forav similarpurpose the laterally outer side armchannel is` provided witha. deep notch*- |z63 soas to provide: adequate extent of welding when;fasteningf the: parts' together..

As best shown in Figure l, according' tov the` principles. of thepresentl invention, I provide a. tool support indicated in. its entiretyby the referencenumeral |80,` for-connecting toolsf or. other operatingunits tothe tool frame 25,` preferably in such a way as to accommodatelateral movement-of the tool unit or units. In the preferred; formV of.the invention the tool support comprises: a transverse square bar I-8Iadapted to receivee one or more tool units, indicated diagrammati` callyin full lines at |82'. A pair of supporting clampsr at each end1 ofthesquare barr |8I support thelatter. Such clampingV means is indicated in'its entirety by the reference numeral |83 and comprises. a cap- |84.secured by apair of cap: screws. |85 to a. clamping member |86 having asocket |81 toy receive the tool bar I 8|. Each of the clamping members|86. includes a. main body section |88 having a lower downwardlyextending engaginglug |89 and an upper. socket section |9I outwardly ofwhich is disposed a pair of. guiding lugs |93 the adjacent edges orwalls. of.v which taperv convergingly upwardly.

Cooperating with the member |86 is a companion link-receiving bracketmember 20| which is provided at its lower portion with an `upwardlyextending lug 202 and at its upper portion an upwardly extendinglug'section 204. The lug 202 cooperates with the main body of thebracket 20| to form a notch 205 that is shaped to receive thecooperating lug |89 on the clamping member |83, and the lug 204 formswith the main body of the bracketf20| an upwardly'facing upper notch201- whereby the lug 204 is permitted to sea-t rmly and snugly in thenotch I9I in the clamping member |83.

The inner portion of each ofthe bracket members 202| is provided with'asleever section 20'8 that receives avverticali pi'vot boltr 209; A pairof? link members 2 I 0 connects the two. bracket mem--l bers 20| withthe cross bar28, a similar pivot pin 2II connecting the inner portionsof the links with. the bearing sleeve' sections 6| ofthe associatedoffset cross bar members 55. `Each ofl the; link members 2|0 comprises acentral body section 2| 5 and pairs of apertured lugs 2 |f1 receiving:the pivot pins'209 and 2 I I. Disposed onthe outward pivot pins 2.09,preferably the upper por-VV tions thereof, is a brace member 2|9 whichcomprises a pair of overlapping bars 22| and 2-22, each. provided with aplurality ofl `apertures 223' and associatedfastening boltr means 224whereby the effective. lengthof. the brace member 2 IS'may be changedas. desired. The brace member 2 I9 is disposed adjacent but spaced fromlthe central section 5I of the cross'bar'member 28, the latter beingoffset so as to afford ample clearance between the cross bar' memberVand the adjacentv portionsof the propellingftractor.

ther tool supporting` bar" 0|l may be adjusted. asf

desired providing thebolts.22.4f are removed from the; crossbrace;members 22| and 222. After the* desired` lateral.` adjustment has beenmade, the bolt'ss224; may be-replaced and tightened, whereby'theclamping units for the bar |8.| remain fixed sofar as their lateralspacing is concerned. This also determines the angularity ofi theconnecting; links 2-I.0. which: it will be noted are rigid in avertical= direction. but permit lateral movement of the tool meansmounted on the bar |8I. By vvirtue of the aforesaid adjustment, thelinks,

-g 210: may be arranged to diverge outwardlyorv converge outwardly,depending on whether thel draulic cylinder. units I5. While theseunitsmay,

in thezbroader'aspects of our invention, be of. any suitableconstruction, they are, according to my invention, preferably so.constructed and arranged as. to accommodate theready reversal ofthetool frame relative. tothe tractor; that is, the toolframe. may be.arranged with the tool carrying cross bar and associated parts eitheratthe front or atthe rear of the tractor, asdesired.

Referring now to Figure 2, each of the power y cylinder units I5.comprises a. cylinder section 23| and a. crank. case. section 232. Thecylinder sec-v tion 23|. is formed. internally as a cylinder. andadjacent one. end. hasanattaching pad. 234 provided. withtapped openingsto receive cap screws.,

235. that. extend. upwardly through. the holes. I`|.9 in the cylindermounting member II.5. The crank case section 232. comprises a. housing.having. anupward. extension. 238- provided with bearing sections inwhich. a shaft 24| is disposed for rocking. movement. An arm 242 isfixed to the shaft 24l| and. extendsy downwardly into the. housing 232,carrying a pivot member 244 vto. which the outer end' oi? a connectingrod or pitman 245 is connected..

The. shaft 24| extends outwardly of the housing4 232 in sealed relationand carries a powerl lift arm 265 having a chain socket 256 aty itsouter end. A, slot 261 in the socketsection 266 providesfor thereception of a chain. link. therein whereby a chain 269, connectedin anysuitable way, as at 21I, to the associated side arm, may,

be. connected in adjusted relation between'the side arm andtheassociated power liftarm 265. Fluid underv pressure isjdelivered fromthe. power unit It to onev end of the cylinder 23| under the control of"suitable valve mechanism, not shown,.

whereby' when fluidr is delivered to the cylinder.' 2'3I' andthe piston248 forced outwardly, the arm 265 israised, thereby acting through theassociated-chain 289 to raise the tool frame, itbeingunderstoodthat'fluid'is'delivered to both of then hydraulic* power'liftunits I5 whereby the tool frame in being raised is loaded generallyuni-i formly: A'ltering vent device 216 is' provided for the housing"232.

The operation'of the tool 'carrier described above isv substantiallyasfollows.

Figure"l'showstheparts of the device arranged inf trailingrelation,withthe tools |82 adapted towork the'groundbehindthe tractor I0'.A Whenarranged inthisrelation, the brace links 22| and 7 222 and associatedclamps are arranged so as to hold the connecting links 2I0 in forwardlyconverging relation, thereby providing for lateral movement of the toolunit or units about a virtual pivot point forward of the actual physicalconnection between the tool support and the tool frame. If, for example,it should be desired to use tools that are adapted to be pushed, suchas, a scraper, snow plow or the like, in which case it is usuallydesired to dispose the cross bar 28 and associated parts at the front ofthe tractor, in order to effect the necessary reversal of the toolmounting, all that it is necessary to do is to disconnect the hosecouplings 215 and turn the locking pins |44 into a position forunlocking and to withdraw them from the holes |45 in the socket membersof the side arms, whereupon the caps |35 may be swung away from thesockets |3| and the front ends of the side arms 26 and 21 may be droppedto the ground. After the side arms are thus disconnected from thetractor, the cylinder units |5 may be disconnected from the sides of thetractor merely by removing them from their bearing supports |06 anddisconnecting the hose lines 215, it being necessary, of course, toremove the bolts 235. The tractor I0 may then be backed away from theimplement and then driven forwardly into a position for reconnectiontherewith, the power cylinders and the socket members of the side armsbeing reconnected with the tractor simply and easily by a reversal ofthe steps outlined above. The cross bar 2B may be leveled with respectto the tractor and/or the side arms 26 and 21 by turning one or theother of the cranks 81, and the cross bar 28 as a whole may be raisedand lowered relative to both of the cranks. Where only leveling isdesired, it is necessary to provide only one adjusting crank 81,connecting the other end of the cross bar 28 rigidly to the associatedside arm. The convergence or divergence of the links 2l0 may be adjustedby loosening the crank associated with the bar IBI and readjusting theposition of the brace links 22| and 222.

While I have shown and described above the preferred structure in whichthe principles of the present invention have been incorporated, it is tobe understood that my invention is not to be limited to the particulardetails shown and described above, but that, in fact, widely differentmeans may be employed in the practice of the broader aspects of myinvention.

What I claim, therefore, and desire to secure by Letters Patent is:

l. A tool carrier adapted to be connected to a tractor, comprising apair of side arms, each of said arms being adapted to be connected atits inner end with the tractor, means at the outer ends of said armsforming laterally inwardly extending generally tubular sections open attheir laterally inner ends, a transverse cross bar having its endsextending laterally outwardly into and rockably seated in said sections,and separably operable means acting between each end of said cross barand the associated side arm for adjustably fixing said cross bar to theouter ends of said side arms.

2. A tool carrier adapted to be connected to a tractor, comprising apair of generally fore and aft extending side arms adapted to beconnected at their inner ends to the tractor, each of which includes atits outer end a hollow section having a transversely disposed laterallyinwardly opening bar-receiving portion, a transverse cross bar havingits laterally outer ends rockably disposed in said bar-receivingportions, a lever arm fixed adjacent one end thereof to each end of saidbar and extending into the associated hollow arm section, and meanscarried by each side arm and connected with the associated lever armadjacent its other end for adjustably fixing said cross bar to said sidearms.

3. A tool carrier adapted to be connected to a propelling agency, suchas a tractor, comprising a pair of side arms adapted to extend generallylongitudinally of the tractor along the sides thereof, pivotalconnecting means at the inner ends of said arms, for connecting them tosaid tractor, a pair of laterally inwardly directed bearing sections atthe outer ends of said arms and said outer ends having hollowarm-receiving portions joining said bearing sections, a transversetool-receiving cross bar having its ends rockably mounted in saidbearing sections, a lever arm fixed to each end of said cross barlaterally outwardly and extending into the hollow armreceiving portionof the associated side arm, and means extending into the arm-receivingportion of each side arm and acting between the latter and the outer endof the associated lever arm for adjusting the position of the lever armrelative to the side arm associated therewith.

4. In a tool carrier of the type described, a pair of side members, eachhaving a laterally disposed socket, a cross bar carried in said sockets,an arm fixed at one end to each end of said cross bar, a lever connectedat an intermediate point to the outer end of each of said arms, meansconnecting one end of each of said levers to the associated side member,and means connected with the other end of each of said levers and theassociated side member for adjusting the position of each lever relativeto the associated side member.

5. A tool carrier as set forth in claim 4, further characterized by eachof said levers being pivoted to the associated arm, the outer end ofeach lever having a slidable connection with the associated side member.

6. In a tool carrier for tractors and the like, a frame including atool-receiving cross bar and a pair of side arms connected thereto, apair of trunnions adapted to be fixed to said tractor, a pair of socketmembers fixed to the inner ends of said side arms, a releasable cap foreach socket member, each cap having a generally cylindrical surfaceengageable with the associated trunnion, a lug on each cap extendinggenerally radially inwardly of said cylindrical surface, and a recess inthe associated trunnion, said lugs and recesses being located so thateach lug seats in the associated recess, thereby holding said socketmembers against axial displacement relative to said trunnions.

7. In a tool carrier for tractors and the like, a frame including atool-receiving cross bar and a pair of side arms connected thereto, apair of trunnions adapted to be fixed to said tractor, a pair of socketmembers xed to the inner ends of said side arms, a releasable cap foreach socket member engageable with the associated trunnion, hinge meansconnecting each cap with the associated socket, each of said trunnionshaving a transversely extending recess, a plunger carried by said capand engageable with the associated socket member for locking the cap tosaid socket member, and means on said cap and disposable in said recesswhen the cap is locked to the associated socket member for holding saidsocket member on the associated trunnion.

8. n a tool carrier for tractors and the like, a pair of trunnionmembers adapted to be fixed to opposite sides of the tractor generallycentrally thereof, a tool frame having side arms and a cross barconnected to the ends of said side arms, socket members carried by saidside arms adjacent the ends thereof opposite said cross bar to receiveportions of said trunnion members, a pair of power operated unitsdetachably mounted on said trunnion members, means acting between thelatter and said power units to hold the latter against rotation on saidtrunnion members, means connecting said power units with said side arms,said power units and side arms being detachable from said trunnionmembers to accommodate the disposition of said frame either at the frontor rear of said tractor, said power' units being re- Versible, relativeto the tractor, with said side arms, each of said power units includinga lift arm and means connecting the lift arm with the associated sideframe, said lift arms and associated parts being reversible, relative tothe tractor, with said side arms whereby operation of said power unitsin either position or" said power units and frame serves to raise thelatter, and tool-re'- ceiving means carried by said cross bar.

9. In a tool carrier of the type described, a pair of side members, eachhaving a laterally disposed socket, a cross bar carried in said sockets,an arm IiXed at one end to each end of said cross bar, a lever connectedat an intermediate point to the outer end of each of said arms, meansconnecting one end of each of said levers to the associated side member,and adjusting means connected with the other end of each of said levers,said adjusting means comprising a screwthreaded trunnion carried by saidother end of each lever and a rotatable part connected with theassociated side member and having screwthreaded connection with saidtrunnion.

10. In a tool carrier for tractors and the like, a frame including atool-receiving cross bar and a pair of side arms connected thereto, apair of 10 trunnions adapted to be xed to said tractor, a pair of socketmembers fixed to the inner ends of said side arms, a releasable cap foreach socket member engageable with the associated trunnion, a pair ofinterengaging means, one on the cap and the other on said trunnion, forholding each socket member against axial displacement on the associatedtrunnion, means hingedly connecting each cap to the associated socketmember, and means for releasably locking each cap in position on theassociated locking member comprising apertures in said cap and socketmember and a releasable pin extending through said apertures.

JESSE G. LINDEMAN.

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